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ID 114587
Author
Abe, K. The University of Tokyo
Hiraide, K. The University of Tokyo
Ichimura, K. The University of Tokyo
Kishimoto, Y. The University of Tokyo
Kobayashi, K. The University of Tokyo
Kobayashi, M. The University of Tokyo
Moriyama, S. The University of Tokyo
Nakahata, M. The University of Tokyo
Norita, T. The University of Tokyo
Ogawa, H. The University of Tokyo|Nihon University
Sato, K. The University of Tokyo
Sekiya, H. The University of Tokyo
Takachio, O. The University of Tokyo
Takeda, A. The University of Tokyo
Tasaka, S. The University of Tokyo
Yamashita, M. The University of Tokyo
Yang, B.S. The University of Tokyo|Institute for Basic Science
Kim, N.Y. Institute for Basic Science
Kim, Y.D. Institute for Basic Science
Itow, Y. Nagoya University
Kanzawa, K. Nagoya University
Kegasa, R. Nagoya University
Masuda, K. Nagoya University
Takiya, H. Nagoya University
Kanzaki, G. The University of Tokushima
Martens, K. The University of Tokyo
Suzuki, Y. The University of Tokyo
Xu, B.D. The University of Tokyo
Fujita, R. Kobe University
Hosokawa, K. Kobe University|Tohoku University
Miuchi, K. Kobe University
Oka, N. Kobe University
Takeuchi, Y. Kobe University|The University of Tokyo
Kim, Y.H. Korea Research Institute of Standards and Science|Institute for Basic Science
Lee, K.B. Korea Research Institute of Standards and Science
Lee, M.K. Korea Research Institute of Standards and Science
Fukuda, Y. Miyagi University of Education
Miyasaka, M. Tokai University
Nishijima, K. Tokai University
Nakamura, S. Yokohama National University
Keywords
Dark matter
Low background
Liquid xenon
Content Type
Journal Article
Description
A search for dark matter using an underground single-phase liquid xenon detector was conducted at the Kamioka Observatory in Japan, particularly for Weakly Interacting Massive Particles (WIMPs). We have used 705.9 live days of data in a fiducial volume containing 97 kg of liquid xenon at the center of the detector. The event rate in the fiducial volume after the data reduction was (4.2 ± 0.2) × 10−3 day−1 kg−1 keVee−1 at 5 keVee, with a signal efficiency of 20%. All the remaining events are consistent with our background evaluation, mostly of the “mis-reconstructed events” originated from 210Pb in the copper plates lining the detector’s inner surface. The obtained upper limit on a spin-independent WIMP-nucleon cross section was 2.2 × 10−44 cm2 for a WIMP mass of 60 GeV/c2 at the 90% confidence level, which was the most stringent limit among results from single-phase liquid xenon detectors.
Journal Title
Physics Letters B
ISSN
03702693
NCID
AA11537044
AA00774026
Publisher
Elsevier
Volume
789
Start Page
45
End Page
53
Published Date
2018-12-05
Rights
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Science and Technology